1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 //#define LOG_NDEBUG 0 18 #define LOG_TAG "ProcessInfo" 19 #include <utils/Log.h> 20 21 #include <media/stagefright/ProcessInfo.h> 22 23 #include <binder/IPCThreadState.h> 24 #include <binder/IProcessInfoService.h> 25 #include <binder/IServiceManager.h> 26 27 namespace android { 28 29 ProcessInfo::ProcessInfo() {} 30 31 bool ProcessInfo::getPriority(int pid, int* priority) { 32 sp<IBinder> binder = defaultServiceManager()->getService(String16("processinfo")); 33 sp<IProcessInfoService> service = interface_cast<IProcessInfoService>(binder); 34 35 size_t length = 1; 36 int32_t state; 37 static const int32_t INVALID_ADJ = -10000; 38 static const int32_t NATIVE_ADJ = -1000; 39 int32_t score = INVALID_ADJ; 40 status_t err = service->getProcessStatesAndOomScoresFromPids(length, &pid, &state, &score); 41 if (err != OK) { 42 ALOGE("getProcessStatesAndOomScoresFromPids failed"); 43 return false; 44 } 45 ALOGV("pid %d state %d score %d", pid, state, score); 46 if (score <= NATIVE_ADJ) { 47 ALOGE("pid %d invalid OOM adjustments value %d", pid, score); 48 return false; 49 } 50 51 // Use OOM adjustments value as the priority. Lower the value, higher the priority. 52 *priority = score; 53 return true; 54 } 55 56 bool ProcessInfo::isValidPid(int pid) { 57 int callingPid = IPCThreadState::self()->getCallingPid(); 58 // Trust it if this is called from the same process otherwise pid has to match the calling pid. 59 return (callingPid == getpid()) || (callingPid == pid); 60 } 61 62 ProcessInfo::~ProcessInfo() {} 63 64 } // namespace android 65
